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(A) Diagram of the manual Rn-222 generator used to produce Pb-214 and Bi-214, (B) Rn-222 decay scheme, including the parent radionuclide Ra-226 and showing the generation and extraction of short-lived Pb-214 and Bi-214, (C) in-growth of Pb-214 and Bi-214 over time when Rn-222 is moved to C1 or D, (D) Pb-214 and Bi-214 decay plot of Pb-214 and daughter Bi-214 over time during equilibrium, and (E) gamma-ray spectra of Pb-214 and Bi-214 on a NaI detector.
